Ram



` E. KlEcKsEE RAM Mbo m m6.

Patented Feb. 18, 1936 PATENT GFFICE RAM Ernst Kiecksee, Leipzig,Germany,

assignor, by

mesne assignments, to YMeco-Brennkraft-Maschinen G. m. b. H.,

Germany Application August 17 tIn l'Germany 12 Claims.

The present invention relates to van internal combustion ram i. e., aram in which a cylinder movable relativelyto a piston constitutes theram block and in which the lcylinder `is urged upwardly by the explosionof fuel in lthe cylinder and then Afalls under the action of itsownweight.

According 'to `the invention a much more delicate Aand 1faci-lefoon-trol of the ram is rendered `possible 'in that the fuel vis fedinto the ramcylinder by means of -a pump -member which isconnecedw'iiththe ram cylinder and 'is moved manually or by means ofauxiliary springs. Such a pump member which can 'beconstituted by Vasmall piston -or conversely by "a small pump cylinder is very lightlandi-correspondingly responsive to lcontrol and if lthe pump member issubjected vto 'the action of a spring then the ram can operate in acompletely automatic manner from the time that "it is started until itis stopped. Also in consequence of its small weight the pump member canreadily be constructed for remote control. A further simplification ofthe manipulation is attained in the present invention in that-the'pumpmember is 'associated 4vwit-h an outlet for the combustion gases, theoutlet being Vmanually controlled or automatically controlled from thepump member. A further Asimplification is Vattained in lthat the pumpmember is constructed to operate lat the same time as contact'maker forthe ignition. A particularly compact and simple construction isatta-ined according to the invention in particular in that an auxiliarypiston which is axially movable in the ram cylinder itself is providedlas pump member and moreover vby accommodating the vaporizer inthe ramcylinder. In order that one and the same ram can rbe used 'both asstamper as well as rammer-log corresponding interchangeable -.footpieces are provided .for attachment to the .rod of rthe working piston.

In the accompanying drawing:

Figs. 1 through 4 are longitudinal sectional views through an internalcombustion ram constructed yin accordance with the invention andillustrating the various successive stages during operation thereof.

Fig. .5 is a detail view of an arrangement employed for securing a footpiece, and Y Fig. 6 is a detail view of a type of stamper foot which maybe used with the device.

The ram consists of the `ram `cylinder I, the working piston 2 disposedtherein and provided with piston rod 3 and a pump member 5 which in theexample shown is in the form of a small Frankfort-on-the-Main,

, 1932, Serial No. 629,205 August 20, 1931 auxiliary piston arranged tobe axially displaceable in the head of the cylinder of the ram.

In the embodiment according to Figs. 1-5, the Aauxiliary piston 5 isvolisplaceable by means of .'a 'hand-grip 4 and a valver6 disposed onthe piston 5 5 also participates in the motion of the hand-grip 4. Thevalve 6 is connected by a stem 6 to the rod 4 depending from thehand-grip 4. The rod 4 passes through a central aperture in the top ofthe ram cylinder l and is slidable ver- 1o tically with respect to thecylinder top. The stem 4' is guided in its vertical sliding movement bya spider 5 secured within the auxiliary piston 5. The spider 5 isprovided with a central aperture through which the stem 4 passes.

A fuel 'vaporizer 28 is disposed in the lower part of the ram cylinderI. This vapoizer comprises a 'perforated disc or a sieve 2| from whichwicks 22 hang into the liquid 23 which is to be vaporiZed. The vaporizerchamber is provided in 20 addition with an air inlet socket 24 withdeilector surfaces 25 provided therein to prevent the liquid from beingvthrown out on the'upward stroke of the ram cylinder I. By means of aconduit 28 containing a check valve 28 the vaporizer cham- 25 ber 20 isAconnected with the space 1 in the cyl- 'inder head which contains theauxiliary piston 5. The conduit 28 is provided with a one-Way valve '28near the point where it connects with the chamber 1. This valve permitsfuel vapor to be 30 drawn into the chamber 1 but prohibits explosiongases from descending the conduit 28. The cylinder space 1 is connectedwith the main cyl- 'inder by way of an aperture 29 in a partition 29which vseparates the two cylinder chambers from each other. A restoringspring 26 surrounds the kpiston 3. The lower end of the restoring spring26 extends into an annular cavity 21 provided within the vaporizerchamber which enables the length of the restoring spring to beincreased. If 40 the ram is to be used as a rammer-log then a foot piece30 of the form shown in Figs. l to 4 for example is associated with theram cylinder I and secured thereto by suitable means such as by the bolt30.v The lower end of the piston 45 rod 3 carries a flanged collar 35.The extreme end portion of the lower end of the piston rod below thecollar 35 is split. A nut 33 is secured to this end by screwing itthereon and this nut is retained in place also by a spreading screw 32.34 is a buffer spring.

The reference numeral 36 represents a contact in the ignition circuit31. This contact is normally closed. However, when the auxiliary pistonis raised 11o its uppermost position, it is broken vso 55 as to causethe spark plug or other igniting means 38 to spark. 31 represents abattery or other source of electrical power for the ignition circuit and38 represents the necessary spark coil. Such an ignition circuit is verycommon in internal combustion engine systems. l

The mode of operation ofthis form of the invention is illustrated inFigs. l to 4 which show the successive stages of operation.

The device is shown at rest in Fig. 1. To set the ram in operation theauxiliary piston 5 which in consequence of its own weight is resting onthe partition 29 is raised by means of the handle 4. This stage of theoperation is shown in Fig. 2. In this way vaporized fuel is drawn into'the cylinder space 1 from the vaporizer chamber 20 and simultaneouslywith the lifting of the auxiliary piston 5 the valve 6 is raised intothe closed position. In other words, as the hand-grip 4 is raised therod 4', the valve stem 6', and the valve 6 will also be raised. Theseelements are integral as described above. The rod 4 is slidablevertically with respect to' the top of the ram cylinder I and the valvestem 6' is slidable vertically in the spider 5 also as described above.As the valve 6 is raised the opening in the auxiliary piston 5 is closedthereby. Further upward movement of the hand-grip'4 results in a risingmovement of the auxiliary piston 5. In its raised position the auxiliarypiston 5 opens a contact 36 in the ignition circuit whereby the ignitionof the fuel air mixture drawn into the space 1 is effected. Due to theexplosion the ram cylinder I is thrown upwardly as shown in Fig. 3. Thepiston 2 and the piston rod 3, however, are arrested by the pressure dueto the reaction. When the ram cylinder I is thrown upwardly theexplosion gases ultimately escape through an outlet 8 provided in thecylinder I. At the same time the spring 26 is compressed and under theaction of this spring the piston 2 moves upwardly relative to the ramcylinder I. Fig. 4 shows the highest position of the cylinder and thepiston just before the whole device falls of its own weight so that theelements assume the positions shown in Fig. l. The workman operating theram involuntarily moves the handle 4 downwardly following the downwardmotion of the cylinder I and in this way the valve 6 is allowed to openso that the combustion gases can escape through the aperture 29', pastthe valve 6 and through the auxiliary pisto'n 5. According to the amountby which the operator lowers the pump piston 5 before raising it again,(the lowermost position being determined by the partition 29), a greateror smaller quantity of fresh fuel is drawn into the cylinder space 'Iand caused to explode and consequently the cylinder I is again urgedupwardly against the action of the spring 26 and again allowed to dropand so on. The operator can regulate the weight of the blow of the ramby lowering the auxiliary piston 5 to a greater or less extent.

I n the embodiment shown in Figs. 1-4, as mentioned above a sleeve orcollar 35 is provided on the end of the piston rod between the bufferspring 34 and the foot piece 3 secured to the cylinder I as describedabove and due to the action of this sleeve and the buffer spring 34 theimpact of the foot piece 30 will initially be taken up somewhatresiliently. If on the other hand the ram is to be used as a stamperthen, instead of the foot piece 30, the stamper head 3I of Fig. 6 issecured to the piston rod 3 by means of the nut 33. The stamper head isnot secured to the main body of the device by any bolt such as by 30' asis the foot piece 30. The stamper head 3l, together with the piston rod3 and the working piston 2, remains at rest during the upward anddownward motion of the ram cylinder. Each time the ram cylinder dropsthe lower end thereof impacts against the stamper head 3I.

What I claim is:

l. In a portable manually operated internal combustion ram hand tool, aram body having a cylinder therein, a working piston in said cylinder,said ram body and piston being mounted for relative movement in adirection axially of the cylinder, said ram body having a chambercommunicating with said cylinder, a fuel feeding piston movable in saidchamber, said ram body having a vapo'rizing chamber therein for holdingliquid fuel communicating with said first chamber, said vaporizingchamber being located below said cylinder, said ram body having anannular chamber within said vaporizer chamber, a piston rod connected tosaid first piston and extending through said annular chamber, and a coilspring around said piston rod normally urging said piston into' saidcylinder, said spring extending into said annular chamber.

2. In a portable manually operated internal combustion ram hand tool, aram body having a cylinder like portion therein, a working piston insaid cylinder like portion, said ram body and piston being mounted forrelative movement in a direction axially of the cylinder like portion, asecond cylinder like portion rigid with said first portion and havingits axis parallel to the axis of said first portion and in communicationtherewith, a feeding piston manually movable in said second cylinderlike portion axially thereof relative to said ram body, and a handledisposed above said ram body for holding and operating the device, saidhandle being connected to said feeding piston for operating the same.

3. In a ram as claimed in claim 2, means controlled by movement of thefeeding piston to ignite the fuel.

4. In a ram as claimed in claim 2, outlet means in said feeding pistonto permit the escape of combustion gases.

5. In a ram as claimed in claim 2, outlet means in said feeding pistonto permit the escape of combustion gases, and valve means on saidfeeding piston to control said outlet means.

6. In a ram as claimed in claim 2, outlet means in said feeding pistonto permit the escape of combustion gases, valve means on said feedingpiston to control said outlet means, and common manual means for movingsaid feeding piston and valve means.

'7. In a ram as claimed in claim 2, said ram body also having avaporizing chamber therein for holding liquid fuel and means to conductfuel from said chamber to said second cylinder like portion.

8. In a ram as claimed in claim 2, said ram body also having avaporizing chamber therein for holding liquid fuel and means to conductfuel from said chamber to said second cylinder like portion, saidvaporizing chamber being located below said first cylinder like portion,said ram body having an annular chamber Within said vaporizer chamber, apiston rod connected to said rst piston and extending through saidannular chamber, and a coil spring around said piston rod normallyurging said piston into said cylinder, said spring extending into saidannular chamber.

9. In a portable manually controllable internal combustion ram handtool, a ram body having a cylinder therein, a working piston in saidcylinder, said ram body being mounted for movement in a directionaxially of the cylinder when placed in normal work position, said rambody having a chamber communicating with said cylinder and rigidtherewith, a partition between :said cylinder and said chamber having acentral opening therein, a fuel feeding piston movable in said chamberin a direction parallel to the axis of said cylinder, and a handledisposed above said ram body connected to said piston.

10. In a ram as claimed in claim 9, outlet means in said feeding pistonto permit the escape of combustion gases and valve means to control saidoutlet means.

l1. In a portable manually operated internal Y combustion ram hand toolhaving an explosion chamber, a fuel chamber below said explosionchamber, and means for conducting fuel from said fuel chamber to saidexplosion chamber, a piston slidable in said explosion chamber, a pistonrod connected to said piston and extending downwardly through said fuelchamber, said ram having an annular chamber Within said fuel chamber,and a coil spring around said piston rod normally urging said pistoninto said explosion chamber, said spring extending into said annularchamber, a handle disposed above the device, and means connected to saidhandle for operating said first named means.

l2. In a portable manually controllable internal combustion ram handtool, a ram body having a cylinder therein, a working piston in saidcylinder, said ram body and piston being mounted for relative movementin a direction axially of the cylinder, said ram body also having acombustion space therein coaxial with said cylinder and communicatingtherewith, a partition between said cylinder and said chamber having acentral opening therein, a feeding piston movable in said combustionspace axially of the cylinder to feed fuel to said combustion space,

and a handle disposed above said ram body for l holding and operatingthe device, said handle being connected to said feeding piston.

ERNST KIECKSEE.

